Physics - Questions and Answers, General Study (GK)

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Physics - Questions and AnswersPage 35

341.

'mho' is the unit of

(a)resistance

(b)specific resistance

(c)conductivity

(d)none of these

Comment

Answer is: DNA

342.

Which one of the following non-metals is not a poor conductor of electricity?

(a)Sulphur

(b)Selenium

(c)Bromine

(d)Phosphorus

Comment

Answer is: BNA

343.

Which type of cell can be used if a device requires 75 A of current for 15 s?

(a)Simple voltaic cell

(b)Daniel cell

(c)Leclanche cell

(d)lead-acid cell

Comment

Answer is: DNA

344.

Which one of the following is printed on a commonly used fluorescent tube light?

(a)220 K

(b)273 K

(d)9000 K

Comment

Answer is: DNA

345.

What is the order of magnitude of electric resistance of the human body (dry) ?

(a)10² Ω

(b)10⁴ Ω

(d)10⁸ Ω

Comment

Answer is: ANA

346.

Choke used to limit high frequency AC has

(a)air core

(b)iron core

(c)a paramagnetic core

(d)A diamagnetic core

Comment

Answer is: DNA

347.

Fluorescent tubes are fitted with a choke. The choke coil

(a)steps up the line voltage

(b)Steps down the line voltage

(c)Reduces current in the circuit

(d)chokes low frequency current

Comment

Answer is: ANA

348.

Domestic electrical wiring is basically a

(a)series connection

(b)parallel connection

(c)combination of series and parallel connections

(d)Series connection with in each room and parallel connection elsewhere

Comment

Answer is: ANA

349.

Which of the following quantities remain constant in a step down transformer?

(a)Current

(b)Power

(c)Voltage

(d)none of the above

Comment

Answer is: BNA

350.

Phase difference between voltage and current in a capacitor in AC circuit is

(a)π

(b)0

(c)π/2

(d)π/3

Comment

Answer is: CNA

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Physics - Questions and AnswersPage 35

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