physics MCQs – Page 14

Practise multiple-choice questions from physics for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

physics Mcqs
261. pure resistor circuit the voltage and current are_______________?
comments icon0

A. Lagging each other

B. They are at 90? phase difference

C. No phase difference

D. They have zero phase difference
262. CFC is used in _________________?
comments icon0

A. Aerosol spray

B. Refrigeration

C. All of above

D. Plastic foam industry

263. When arrow is released form its bow, its energy is transformed from _____________________?
comments icon0

A. heat energy to K.E

B. elastic P.E to K.E

C. K.E to elastic P.E.

D. elemical energy to elastic P.E

264. An angle between two vectors A and B can be determined by_____________?
comments icon0
A. Their dot product

B. Head to tail rule

C. Their cross product

D. Right-hand rule

265. Work has the dimension as that of same as that of__________________?
comments icon0
A. torque

B. power

C. linear momentum

D. angular momentum

266. Materials in which valence electrons are tightly bound to their atoms at low temperature are called___________________?
comments icon0

A. Super conductors

B. Insulators

C. Conductor

D. Semi conductor

267. Mass of neutron is________________?
comments icon0
A. 1.67 x 10-27 kg

B. 9.1 x 10-31 kg

C. 1.67 x 10-31 kg

D. 1.67 x 10-19 kg

268. At resonance the value of the power factor in an L-C-R series circuit is_______________?
comments icon0
A. 1

B. Not definite

C. 2

D. Zero

269. The net charge on n-type material is____________________?
comments icon0

A. Positive

B. Negative

C. Both positive and negative

D. Neutral
270. The charge on alpha particles is________________?
comments icon0

A. Plus one

B. Minus two

C. Plus two

D. Minus one

271. If A=Ax i^ + Ay j^ + Az K^ B = Bx i^ + By j^ + Bz K^ then______________?
comments icon0

A. A. B = Ay Bz + Az By + Az Bx

B. A. B = Ax By + Ay Bz + Az By

C. A. B = Ax Bz + Ay By + Az Bx

D. A. B = Ax Bx + Ay By + Az Bz
272. The magnetic field strength of solenoid is__________________?
comments icon0

A. B = ?NI

B. B = ?N/I

C. B = ?nI

D. Both B and C
273. A voltage V = V0 cos ?t is applied across a resistor of resistance R the average power dissipated per cycle in the resistor is given by___________?
comments icon0

A. 2/?2?R

B. V/?2?R

C. V02/?2R

D. V?/?2R

274. Electromagnetic waves travel in free space with the speed of___________________?
comments icon0

A. More than sound waves

B. Positive rays

C. ?-rays

D. Cathode rays

275. Average distance covered by alpha particles in the air before its ionizing power ceases is called its_________________?
comments icon0
A. Range

B. Firing level

C. Limit

D. Trajectory

276. The relation between horse power and watt is_________________?
comments icon0

A. 1 hp = 546 watts

B. 1 hp = 946 watts

C. 1 hp = 746 watts

D. 1 hp = 1000 watts

277. A wire of length L is stretched by a length E when a force F is applied at one end. If the elastic limit is not exceeded the amount of energy stored in the wire is_________________?
comments icon0

A. FE2/L

B. FE

C. FE2

D. (FE)
278. The deflection for 50 division of galvanometer is decreased to 25 divisions by shunt resistance of 12?. Galvanometer resistance is_____________?
comments icon0

A. 30?

B. 24?

C. 12?

D. 18?

279. The sensitivity of a galvanometer is given by__________________?
comments icon0

A. BAN/C

B. ABC/N

C. CAN/B

D. C/BAN
280. The consumption of energy by a 60 watt bulb in 2 sec is_________________?
comments icon0

A. 60 J

B. 0.02 J

C. 120 J

D. 30 J