Electromagnetic Induction & Alternating Currents (AIIMS Physics): Questions 5 - 7 of 51

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Question number: 5

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

Appeared in Year: 2001

MCQ▾

Question

The coil of choke in a circuit: [AIIMS]

Choices

Choice (4) Response
a.

Increases the current

b.

Does not change the current

c.

Decrease the current

d.

Has high resistance to d c circuit

Question number: 6

» Electromagnetic Induction & Alternating Currents » Electromagnetic Induction

Appeared in Year: 2000

MCQ▾

Question

If the rotational velocity of a dynamo armature is doubled, then induced emf will become – [AIIMS]

Choices

Choice (4) Response
a.

Half

b.

Four times

c.

Unchanged

d.

Two times

Question number: 7

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

Appeared in Year: 2005

MCQ▾

Question

A magnet is made to oscillate with a particular frequency, passing through a coil as shown in figure. The time variation of the magnitude of emf generated across the coil during one cycle is – [AIIMS]

A magnet oscillate through a coil

A Magnet Oscillate Through a Coil

In figure a magnet is made to oscillate with a particular frequency, passing through a coil.

Choices

Choice (4) Response
a.
Graph of emf verses time (Choice-A)

Graph of Emf Verses Time (Choice-A)

Figure shows the time variation of the magnitude of emf generated across the coil during one cycle.

b.
Graph of emf verses time (Choice-B)

Graph of Emf Verses Time (Choice-B)

Figure shows the time variation of the magnitude of emf generated across the coil during one cycle.

c.
Graph of emf verses time (Choice-C)

Graph of Emf Verses Time (Choice-C)

Figure shows the time variation of the magnitude of emf generated across the coil during one cycle.

d.
 Graph of emf verses time (Choice-D)

Graph of Emf Verses Time (Choice-D)

Figure shows the time variation of the magnitude of emf generated across the coil during one cycle.

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