In perfectly elastic collision:
- Only momentum is conserved
- Only K.E is conserved
- Total energy, K.E & momentum all are conserved
- Only total energy is conserved
Instantaneous velocity along the curved path is :
- Parallel to the radius
- Along the tangent
- Anti parallel to the radius
- Perpendicular to the slope
If the car is slowing down along X axis then acceleration will be along :
- Positive X axis
- Positive y axis
- Negative X axis
- Negative y axis
A 32g radioactive element decay and remain 2g after 60 days. What is the half life of this element:
- 6 days
- 10 days
- 15 days
- 2 days
The time taken for half the number of atoms of radioactive isotopes to disintegrate, is called:
- Total life
- Average life
- Half life
- Mean life
In full wave rectification _____ diodes is used:
- 2
- 1
- 3
- 4
The conversion of AC into DC is called:
- Resolution
- Magnification
- Rectification
- Amplification
A device that convert AC into DC is called:
- Inductor
- Diode
- Transistor
- Capacitor
In fleming right hand rule, second finger represents:
- Magnetic field
- Induced current
- Motion
- Force
The lenz’s law is also statement of law of conservation of:
- Charge
- Energy
- Mass
- Pressure
