Options:
- A. 45
- B. 90
- C. 180
- D. 0
View Answer
D. 0
Physics
The area under the force displacement graph represents__________________?
Options:
- A. area
- B. work done
- C. power
- D. none of these
View Answer
B. work done
A ferromagnet will become fully magnetized at_________________?
Options:
- A. High voltage A.C
- B. Low voltage A.C
- C. Alternating current at its peak value
- D. D.C current at peak value
View Answer
C. Alternating current at its peak value
Any alteration produced in shapes length or volume when a body is subjected to some external force is called____________________?
Options:
- A. Stiffness
- B. Toughness
- C. Extension
- D. Deformation
View Answer
D. Deformation
Which one of the following material is most suitable for making core of an electromagnet ?
Options:
- A. air
- B. steel
- C. Cu-Ni alloy
- D. soft iron
View Answer
D. soft iron
When a particle of charge q and mass m enters into a uniform magnetic field B moving with a velocity v perpendicular to the direction for the field it describes a circular path of radius___________________?
Options:
- A. R=qB/mV
- B. R=mV/qB
- C. R=qmV/B
- D. R=qmB/V
View Answer
B. R=mV/qB
A moving coil galvanometer of resistance 100? gives half scale deflection for a current of 20mA. What will be the potential difference across it ?
Options:
- A. 4 volt
- B. 5 volt
- C. 2 volt
- D. 0.4 volt
View Answer
C. 2 volt
When A.C current passes through a capacitor then the current relationship will be_______________?
Options:
- A. The current lead voltage by phase angle is 90 degrees
- B. The voltage leads current by phase angle is 90 degrees
- C. The current lead voltage by phase angle is 45 degrees
- D. The voltage leads current by phase angle is 45 degrees
View Answer
A. The current lead voltage by phase angle is 90 degrees
n an LCR series circuit, if V is the effective value of the applied voltage VR is the voltage across R VL is the effective voltage across L & Vc is the effective voltage across C then_______________?
Options:
- A. V = VR+VL+VC
- B. V2 = VR2+VL2+VC2
- C. V2 = VR2+(VL-VC)2
- D. V2 = VL2+(VR-VC)2
View Answer
C. V2 = VR2+(VL-VC)2
It is easier to turn a steering wheel with both hands than with a single hand because______________?
Options:
- A. Accelerating force increases on the wheel
- B. Two forces act on the wheel
- C. Two hands provide a firm grip
- D. The couple acts on the wheel
View Answer
D. The couple acts on the wheel