Electromagnetic Induction & Alternating Currents (AIIMS Physics): Questions 1 - 4 of 51

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Question number: 1

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

Appeared in Year: 1997

MCQ▾

Question

A coil of copper having 1000 turns is placed in a magnetic field (B=4×103T) perpendicular to its plane. The cross sectional area of the coil is 0.05 m2. If it turns through 180° in 0.01 sec, then the induced emf in the coil is – [AIIMS]

Choices

Choice (4) Response
a.

0.2 V

b.

4 V

c.

40 V

d.

0.4 V

Question number: 2

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

Appeared in Year: 1997

MCQ▾

Question

A choke coil should have – [AIIMS 1999]

Choices

Choice (4) Response
a.

Low resistance and high inductance

b.

High resistance and low inductance

c.

Low inductance and low resistance

d.

High resistance and high inductance

Question number: 3

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

Appeared in Year: 2005

MCQ▾

Question

A conducting ring of radius 1 meter is placed in a uniform magnetic field B of 0.01 T, oscillating with frequency 100 Hz with its plane at right angles to magnetic field. What will be the induced electric field? [AIIMS]

Choices

Choice (4) Response
a.

10voltsm

b.

2voltsm

c.

πvoltsm

d.

62voltsm

Question number: 4

» Electromagnetic Induction & Alternating Currents » Eddy Currents

Appeared in Year: 2006

MCQ▾

Question

A metallic ring is dropped down, keeping its plane perpendicular to a constant and horizontal magnetic field. The ring enters the region of magnetic field at t = 0 and completely emerges out at t = T sec. The current in the ring varies as – [AIIMS]

Choices

Choice (4) Response
a.
Current varies with time (Choice-A)

Current Varies With Time (Choice-A)

Figure shows current in the ring varies with time.

b.
Current varies with time (Choice-B)

Current Varies With Time (Choice-B)

Figure shows current in the ring varies with time.

c.
Current varies with time (Choice-C)

Current Varies With Time (Choice-C)

Figure shows current in the ring varies with time.

d.
 Current varies with time (Choice-D)

Current Varies With Time (Choice-D)

Figure shows current in the ring varies with time.

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