The current i flowing through the cell in the given circuit is (internal resistance of cell is zero)
1 A
3/2 A
2 A
3 A
If somehow the distance between the Sun and the Earth is doubled, the gravitational force between them will become
double
half
four times
one-fourth
If the magnitude of vector is 10 cm and the direction is North, then what is the magnitude and direction of the vector ?
20 cm East
20 cm West
20 cm North
20 cm South
D.
20 cm South
The negative sign shows the opposite direction of the given vector, also the magnitude of the vector is multiplied by 2. So the required vector -2A = 20 cm south.
An electric charge q moves with a constant velocity v parallel to the lines of force of a uniform magnetic field B. Force on charge is
qvB
qv/8
Zero
Bv/q
Petroleum is refined by
simple distillation
fractional distillation
steam distillation
vacuum distillation