A man goes 10 m towards north, then 20m towards east, the displacement is
A man goes 10 m towards north, then 20m towards east, the displacement is
Options
(a) 22.5 m (b) 25 m (c) 25.5 m (d) 30 m
Correct Answer:
22.5 m
Explanation:
No […]
Physics
The inductive reactance of an inductor of 1/π henry at 50 Hz frequency is
The inductive reactance of an inductor of 1/π henry at 50 Hz frequency is
Options
(a) 5πΩ (b) 50Ω (c) 50πΩ (d) 100Ω
Correct Answer:
100Ω
Explanation:
No explanation available. Be the first […]
If radius of earth’s orbit is made 1/4, the duration of a year will become
If radius of earth’s orbit is made 1/4, the duration of a year will become
Options
(a) 4 times (b) 8 times (c) 1/4 times (d) 1/8 times
Correct Answer:
1/8 times
Explanation: […]
When aluminium is added as an impurity to silicon, the resulting material is
When aluminium is added as an impurity to silicon, the resulting material is
Options
(a) P-type semiconductor (b) P-type conductor (c) N-type semiconductor (d) N-type conductor
Correct Answer:
P-type semiconductor
Explanation:
No explanation […]
A comb run through one’s dry hair attracts small bits of paper. This is due to
A comb run through one’s dry hair attracts small bits of paper. This is due to
Options
(a) comb is good conductor (b) paper is good conductor (c) atoms in paper gets polarised […]
If temperature of gas increases from 27°C to 927°C, the kinetic energy will be
If temperature of gas increases from 27°C to 927°C, the kinetic energy will be
Options
(a) double (b) half the initial value (c) one fourth (d) four times
Correct Answer:
four times
Explanation: […]
In Young’s double slit experiment, for which colour the fringe width is the least
In Young’s double slit experiment, for which colour the fringe width is the least
Options
(a) Red (b) Green (c) Blue (d) Yellow
Correct Answer:
Blue
Explanation:
No explanation available. Be the first […]
A body has 80 microcoulomb of charge. Number of additional electrons in it will be
A body has 80 microcoulomb of charge. Number of additional electrons in it will be
Options
(a) 8 x 10⁵ (b) 80 x 10¹⁷ (c) 5 x 10¹⁴ (d) 1.28 x 10¹⁷
Correct […]
A tyre filled with air (27° C and 2 atm) bursts. The temperature of air is (ˠ=1.5)
A tyre filled with air (27° C and 2 atm) bursts. The temperature of air is (ˠ=1.5)
Options
(a) -33° C (b) 0° C (c) 27° C (d) 240° C
Correct Answer:
-33° […]
The transverse nature of electromagnetic waves is proved by which of the following?
The transverse nature of electromagnetic waves is proved by which of the following?
Options
(a) Interference phenomena (b) Diffraction phenomena (c) Dispersion phenomena (d) Polarisation phenomena
Correct Answer:
Polarisation phenomena
Explanation:
No explanation […]