Magnetism and Matter Test

Result

Magnetism and Matter Test - 7

Score
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Rank
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Weekly Quiz Competition

Question 1
4 / -1

The magnetic force required to demagnetise the material is

A
retentivity

B
coercivity

C
energy loss

D
hysteresis
Question 2
4 / -1

Susceptibility of ferromagnetic substance is

A
>1

B
<1

C
zero

D
1
Question 3
4 / -1

Permanent magnet has properties retentivity and coercivity respectively

A
high–high

B
low–low

C
low–high

D
high–low
Question 4
4 / -1

Curie-Weiss law is obeyed by iron

A
only at Curie temperature

B
at all temperatures

C
below Curie temperature

D
above Curie temperature
Question 5
4 / -1

The angle between the true geographic North and the North shown by a compass needle is called as

A
inclination

B
magnetic declination

C
angle of meridian

D
magnetic pole
Question 6
4 / -1

The angle between magnetic meridian and geographical meridian is known as

A
magnetic dip

B
magnetic latitude

C
magnetic declination

D
magnetic longitude
Question 7
4 / -1

Tangent galvanometer measures

A
capacitance

B
current

C
resistance

D
potential difference
Question 8
4 / -1

The time period of a freely suspended bar magnet in a field is 2s. It is cut into two equal parts along its axis, then the time period is

A
4s

B
0.5s

C
2s

D
0.25s
Question 9
4 / -1

A straight strip has magnetic moment M. If bent as a semicircle, the magnetic moment of the strip will be

A

B

C

D

Solution
Question 10
4 / -1

Rate of change of torque τ with deflection θ is maximum for a magnet suspended freely in a uniform magnetic field of induction B, when

A
θ = 0°

B
θ = 45°

C
θ = 60°

D
θ = 90°

Solution