PG TRB Physics Online Test - 5

Question: 21

If the glass rod is rubbed with silk ____ charge is produced.

(A) Positive

(B) Negative

(C) Neutral

(D) No charge

Question: 22

At the time of short circuit, the current in the circuit

(A) very continuously

(B) increases heavily

(C) redness substantially

(D) does not change

Question: 23

The velocity of sound in water at 20°C is

(A) 1402 ms^-1

(B) 1482 ms^-1

(C) 1452 ms^-1

(D) 1522 ms^-1

Question: 24

1 newton x 1 metre is equal to

(A) 1 Joule

(B) 1 Watt

(C) 1 H.P

(D) 1 Second

Question: 25

The melting point of ice in the celsius scale is

(A) 0°C

(B) -10°C

(C) 100°C

(D) -273°C