Radar transmits short pulses of high frequency:
- (A) Infrared waves
- (B) Ultrasound waves
- (C) Radio waves
- (D) Sound waves
- (C) Radio waves
‘Fuse wire’ is made of:
- (A) 63% Led and 37% Aluminum
- (B) 63% Tin and 37 % Led
- (C) 63% Silver and 37% Gold
- (D) 63% Gold and 37% Silver
- (B) 63% Tin and 37 % Led
Which of the following is not a feature of solids?
- (A) Definite shape
- (B) Definite volume
- (C) Rigidity
- (D) Frequent fluidity
- (D) Frequent fluidity
Center of mass is point in body which shows only:
- (A) Zigzag motion
- (B) Rotatory motion
- (C) Linear motion
- (D) Translation motion
- (B) Rotatory motion
The force exerted by a uniform electric field on a dipole is:
- (A) Parallel to the dipole moment
- (B) Perpendicular to the dipole moment
- (C) Parallel to the electric field
- (D) Perpendicular to the electric field
- (C) Parallel to the electric field
A wire has a resistance of 6 ohm. It is cut into two parts and both the half values are connected in parallel. The new resistance is:
- (A) 6 ohm
- (B) 3 ohm
- (C) 12 ohm
- (D) 1.5 ohm
- (D) 1.5 ohm
When we heat magnetic material then its magnetism:
- (A) Infinity
- (B) Decreases
- (C) Remains same
- (D) Increases
- (B) Decreases
How the speed of sound will be the maximum if we pass through it from?
- (A) Water
- (B) Air
- (C) Iron
- (D) Vacuum
- (C) Iron
The process in which AC is converted into DC is called:
- (A) Oscillation
- (B) Modulation
- (C) Amplification
- (D) Rectification
- (D) Rectification
Which of the following has the lowest resistivity?
- (A) Silicon
- (B) Nichrome
- (C) Silver
- (D) Ebonite
- (C) Silver