12th Physics weekly Test -1 ( Magnetism and magnetic effects of electric current )

St. Britto Hr. Sec. School - Madurai

12th Physics weekly Test -1 ( Magnetism and magnetic effects of electric current )-Aug 2020

Time : 1.30 Hours

Part - A

Multiple Choice Question - Answer All Question

Fuse wire is an alloy of

lead and tin
tin and copper
lead and copper
lead and iron

A bird sitting on an uninsulated wire carrying a current feels quite safe because

the bird is non-conductor of electricity
resistance of the birds is very large
there is a large potential difference between bird and wire
there is no potential difference between bird and wire

Graph of force per unit length between long parallel current carrying conductors, and the distance between them is

straight line
parabola
ellipse
rectangular hyperbola

An ammeter of resistance of 0.8 Ω can measure current upto 2A. What must be the shunt resistance to enable the ammeter to measure currents up to 10A?

0.1 Ω
0.2 Ω
0.3 Ω
0.4 Ω

If a proton and a deutron move in a magnetic field along the same circular path, then the ratio of their velocities is _____

When current is doubled deflection is also doubled in

moving coil galvanometer
tangent galvanometer
both of them
neither of two

Th e force experienced by a particle having mass m and charge q accelerated through a potential diff erence V when it is kept under perpendicular magnetic field \(\vec { B } \) is

\(\sqrt { \frac { 2{ q }^{ 3 }BV }{ m } } \)
\(\sqrt { \frac { { q }^{ 3 }{ B }^{ 2 }V }{ 2m } } \)
\(\sqrt { \frac { 2{ q }^{ 3 }{ B }^{ 2 }V }{ m } } \)
\(\sqrt { \frac { { 2q }^{ 3 }BV }{ { m }^{ 3 } } } \)

The resistance of a galvanometer is 50 Ω and requires 0.5 mA for full scale deflection. To convert it into voltmeter of range 0-10V, then the value of resistance to be connected in series is
99.95 kΩ

20.05 kΩ

19.95 kΩ

10.05 kΩ
A thin insulated wire forms a plane spiral of N = 100 tight turns carrying a current I = 8 m A (milli ampere). The radii of inside and outside turns are a = 50 mm and b = 100 mm respectively.
The magnetic induction at the center of the spiral is
\(5\mu T\)

\(7\mu T\)

\(8\mu T\)

\(10\mu T\)

A wire of length 1 m carrying a current of 2 A is placed inside a field of magnetic induction 20 T such that it makes an angle of 30° with the direction of the field. The force experienced by the wire is

40N
10\(\sqrt { 3 } \) N
20N
20\(\sqrt { 3 } \)N

When an electric current is passed in a circuit consisting of two different metals, heat is evolved at one junction and absorbed at the other end. This is known as _______

Seebeck effect
Peltier effect
Joule's law
Thomson effect

Part - B

Generic 2 - Answer All Question

What is meant by
(i) Geographic axis
(ii) Geographic meridian &
(iii) Geographic equator

What is Declination?
State the factors on which the current sensitivity of a galvanometer is increased.

Define Voltage sensitivity?

What are the properties of materials used as an electromagnet?
Define magnetic dipole moment.

Part - C

Generic 3 - Answer All Question

Discuss the working of cyclotron in detail.
A given galvanometer is to be converted into (i) an ammeter (ii) a voltmeter. In which case will the required resistance be (i) least (ii) highest and why?

Find the magnetic induction due to a long straight conductor using Ampere’s circuital law.

Write the Properties of magnet.
Obtain the magnetic induction at a point on the equatorial line of a bar magnet.

A long straight wire AB carries a current I. A proton P travels with a speed v, parallel to the wire, at a distance d from it in a direction opposite to the current as shown in figure what is the force experienced by the proton and what is its direction?

Part - D

Generic 5 - Answer All Question

A bar magnet is placed in a uniform magnetic field whose strength is 0.8 T. Suppose the bar magnet orient at an angle 30^o with the external field experiences a torque of 0.2 N m. Calculate:
(i) the magnetic moment of the magnet
(ii) the work done by an applied force in moving it from most stable configuration to the most unstable configuration and also compute the work done by the applied magnetic field in this case.

Calculate the magnetic field at the center of a square loop which carries a current of 1.5 A, length of each loop is 50 cm.

A current 10A is flowing East to West in a long wire kept horizontally in the East - West direction. Find the magnitude and direction of magnetic field in a horizontal plane at a distance of 10 cm North.

A magnetised needle of magnetic moment 3.6 x 10^-2T^-1 is placed at 30° with the direction of uniform magnetic field of magnitude 2 x 10^-2T. Calculate the torque acting on the needle.

Comment

Add Comment

InstaQB

Institutions

12th Standard English Medium

12th Standard Tamil Medium

11th Standard English Medium

11th Standard Tamil Medium

10th Standard English Medium

9th Standard English Medium

8th Standard English Medium

7th Standard English Medium

Class XII

Class XI

12Th Standard

11Th Standard

10Th Standard

9Th Standard

12th Physics weekly Test -1 ( Magnetism and magnetic effects of electric current )

St. Britto Hr. Sec. School - Madurai

12th Physics weekly Test -1 ( Magnetism and magnetic effects of electric current )-Aug 2020

Part - A

Multiple Choice Question - Answer All Question

Fuse wire is an alloy of

A bird sitting on an uninsulated wire carrying a current feels quite safe because

Graph of force per unit length between long parallel current carrying conductors, and the distance between them is

An ammeter of resistance of 0.8 Ω can measure current upto 2A. What must be the shunt resistance to enable the ammeter to measure currents up to 10A?

If a proton and a deutron move in a magnetic field along the same circular path, then the ratio of their velocities is _____

When current is doubled deflection is also doubled in

Th e force experienced by a particle having mass m and charge q accelerated through a potential diff erence V when it is kept under perpendicular magnetic field \(\vec { B } \) is

The resistance of a galvanometer is 50 Ω and requires 0.5 mA for full scale deflection. To convert it into voltmeter of range 0-10V, then the value of resistance to be connected in series is

A thin insulated wire forms a plane spiral of N = 100 tight turns carrying a current I = 8 m A (milli ampere). The radii of inside and outside turns are a = 50 mm and b = 100 mm respectively. The magnetic induction at the center of the spiral is

A wire of length 1 m carrying a current of 2 A is placed inside a field of magnetic induction 20 T such that it makes an angle of 30° with the direction of the field. The force experienced by the wire is

When an electric current is passed in a circuit consisting of two different metals, heat is evolved at one junction and absorbed at the other end. This is known as _______

Part - B

Generic 2 - Answer All Question

What is meant by (i) Geographic axis (ii) Geographic meridian & (iii) Geographic equator

What is Declination?

State the factors on which the current sensitivity of a galvanometer is increased.

Define Voltage sensitivity?

What are the properties of materials used as an electromagnet?

Define magnetic dipole moment.

Part - C

Generic 3 - Answer All Question

Discuss the working of cyclotron in detail.

A given galvanometer is to be converted into (i) an ammeter (ii) a voltmeter. In which case will the required resistance be (i) least (ii) highest and why?

Find the magnetic induction due to a long straight conductor using Ampere’s circuital law.

Write the Properties of magnet.

Obtain the magnetic induction at a point on the equatorial line of a bar magnet.

A long straight wire AB carries a current I. A proton P travels with a speed v, parallel to the wire, at a distance d from it in a direction opposite to the current as shown in figure what is the force experienced by the proton and what is its direction?

Part - D

Generic 5 - Answer All Question

Calculate the magnetic field at the center of a square loop which carries a current of 1.5 A, length of each loop is 50 cm.

A current 10A is flowing East to West in a long wire kept horizontally in the East - West direction. Find the magnitude and direction of magnetic field in a horizontal plane at a distance of 10 cm North.

A magnetised needle of magnetic moment 3.6 x 10-2T-1 is placed at 30° with the direction of uniform magnetic field of magnitude 2 x 10-2T. Calculate the torque acting on the needle.

Comment

Other Study material

12th Physics Monthly Test - 3 ( Magnetism and magn

12th Physics Monthly Test - 1 ( Electromagnetic In

12th Physics Monthly Test - 2 (Current Electricity

12th Physics Monthly Test - 3 ( Current Electricit

12th Physics Monthly Test - 1 ( Magnetism and magn

12th Physics Monthly Test - 2 ( Magnetism and magn

12th Physics weekly Test - 1 ( Communication Syste

12th Physics weekly Test - 2 ( Communication Syste

12th Physics weekly Test - 1 ( Recent Developments

12th Physics weekly Test - 2 ( Recent Developments

12th Physics Monthly Test - 1 ( Electrostatics )

12th Physics Monthly Test - 2 ( Electrostatics )

12th Physics Monthly Test - 2 ( Electrostatics )

12th Physics Monthly Test - 3 ( Electrostatics )

12th Physics Monthly Test - 1( Current Electricity

Tamilnadu Stateboardszs - Class

A thin insulated wire forms a plane spiral of N = 100 tight turns carrying a current I = 8 m A (milli ampere). The radii of inside and outside turns are a = 50 mm and b = 100 mm respectively.
The magnetic induction at the center of the spiral is

What is meant by
(i) Geographic axis
(ii) Geographic meridian &
(iii) Geographic equator

A magnetised needle of magnetic moment 3.6 x 10^-2T^-1 is placed at 30° with the direction of uniform magnetic field of magnitude 2 x 10^-2T. Calculate the torque acting on the needle.