Physics - Questions and Answers, General Study (GK)

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321.

Line spectrum contains information about

(a)the atoms of the source

(b)the atoms of the prism

(c)the molecules of the source

(d)none of the above

Comment

Answer is: ANA

322.

The wavelength of visible light is in between

(a)0.7 μm to 1000 μm

(b)0.1 cm to 30 cm

(d)3000 m to 0.4 μm

Comment

Answer is: CNA

323.

A transformer works with

(a)alternating current

(b)direct current

(c)both AC and DC

(d)any signal

Comment

Answer is: ANA

324.

A fuse wire is made of

(a)an alloy of tin and copper

(b)an alloy of tin and lead

(c)an alloy of tin and aluminium

(d)an alloy of nickel and chromium

Comment

Answer is: BNA

325.

Which one of the following is used in storage batteries?

(a)Copper

(b)lead

(c)Tin

(d)Zinc

Comment

Answer is: DNA

326.

In electric supply lines in india, which parameter is kept constant?

(a)Voltage

(b)Current

(c)Freqeuncy

(d)Power

Comment

Answer is: CNA

327.

Conversion of chemical energy into electrical energy occur in

(a)atomic bombs

(b)Electric heaters

(c)battery

(d)Dynamo

Comment

Answer is: CNA

328.

What is the most commonly used substance in fluorescent tubes?

(a)Sodium oxide and argon

(b)Sodium vapour and neon

(c)Mercury vapour and argon

(d)Mercury oxide and neon

Comment

Answer is: CNA

329.

Increasing the charge on the plates of a capacitor means

(a)increasing the capacitance

(b)increasing the potential difference between the plates

(c)both (a) and (b)

(d)none of the above

Comment

Answer is: BNA

330.

The core of a transformer is laminated so that

(a)ratio of the voltage across the secondary and primary is doubled

(b)the weight of the transformer can be kept low

(c)the rusting of the core is prevented

(d)energy loss due to eddy currents is minimised

Comment

Answer is: DNA

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Physics - Questions and AnswersPage 33

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