Moving Charges and Magnetism Test

Result

Moving Charges and Magnetism Test - 9

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Weekly Quiz Competition

Question 1
4 / -1

A charged particle enters at 30^o to the magnetic field. Its path becomes

A
circular

B
helical

C
elliptical

D
straight line
Question 2
4 / -1

An electron having a charge e moves with a velocity v in X–direction. An electric field acts on it in Y – direction. The force on the electron acts in

A
positive direction Y – axis

B
negative direction of Y – axis

C
positive direction of Z – axis

D
negative direction of Z – axis

Solution
Question 3
4 / -1

A
always zero

B
never zero

C

D

Solution
Question 4
4 / -1

A proton and an α – particle enter a uniform magnetic field perpendicular with the same speed. If proton takes 20μ seconds to make 5 revolutions, then the periodic time for the α – particle would be

A
5μ sec

B
8μ sec

C
10μ sec

D
16μ sec

Solution
Question 5
4 / -1

A straight wire of length 1.0 m and carrying current of 1.2 A is placed in a uniform magnetic field of induction 2T. The magnetic field is perpendicular to the length of the wire.The force on the wire is

A
2N

B
1.2 N

C
3 N

D
2.4 N
Question 6
4 / -1

An electron moves in a circular arc of radius 10 m at a constant speed of 2 × 10⁷ ms^-1 with its plane of motion normal to a magnetic flux density of 10^-5 T. What will be the value of specific charge of the electron ?

A
2 ×10⁴C kg^-1

B
2×10⁵C kg^-1

C
5×10⁶C kg

D
2×10¹¹C kg^-1
Question 7
4 / -1

Which has greater resistance?

A
Voltmeter has more resistance

B
Millivoltmeter has more resistance

C
Both have same resistance

D
Depends on size of meter coil
Question 8
4 / -1

The deflection in moving coil galvanometer falls from 50 divisions to 10 divisions, when a shunt of 12 Ω is applied, the resistance of the galvanometer coil is

A
24 Ω

B
12 Ω

C
50 Ω

D
48 Ω

Solution
Question 9
4 / -1

In a shunted ammeter, only 10% of current passes through the galvanometer of resistance G. The resistance of the shunt is

A
9 G

B
10 G

C
G/9

D
G/10

Solution
Question 10
4 / -1

A voltmeter has resistance of 2000 Ω and it can measure upto 2V. If we want to increase its range by 8V, then required resistance in series will be

A
4000Ω

B
6000Ω

C
7000Ω

D
8000Ω

Solution