A black body emitting all the radiation in the visible region appears________.
A. Green
B. White
C. Blue
D. Black
Physics MCQs with Answers
A photon is always considered to be: ________?
A. Moving with speed of light
B. At rest
C. In accelerated form
D. Moving with speed of sound
The antiparticle of electron is: ______?
A. Proton
B. Meson
C. Neutron
D. Positron
Earth’s orbital speed is __________?
A. 70 km/s
B. 60 km/s
C. 45 km/s
D. 30 km/s
Which instrument is used to detect path of visible rays?
A. Geiger counter
B. Wilson Cloud Detector
C. Solid State Detector
D. None of the above
If the axis of rotation passes through the body and the body moves around itself then the motion is called:
A. Spin motion
B. Orbital motion
C. Rectilinear motion
D. Translatory motion
Relation between linear velocity and angular velocity:
A. v=rw
B. r=vw
C. s=r
D. ∆s/∆t
A potential difference is applied across the ends of a wire. If the potential difference is doubled, then the drift velocity of free electron will.
A. be quadrupled
B. be doubled
C. be halved
D. remain unchanged
A wire of uniform area of cross -section A length L and resistance R is cut into two parts. The resistivity of each part:
A. Become zero
B. Is halved
C. Is doubled
D. remains same
The waves which are used for line of sight (LOS) communication are called:
A. Space waves
B. Cable waves
C. Antenna waves
D. None of these
