A lambda D/d
B lambda d/D
C Dd/lambda
D lambda D d
Explanation: Fringe width = lambda D/d where D is screen distance, d is slit separation.
A Longitudinal wave
B Sound wave
C Stationary wave
D Transverse wave
Explanation: Only transverse waves can be polarized.
A Focal length only
B Wavelength of light
C Aperture of lens
D Both B and C
Explanation: Resolving power depends on wavelength and numerical aperture.
A Concave
B Parabolic
C Plane
D Convex
Explanation: Convex mirrors provide a wider field of view.
A V = IR
B V = I/R
C V = I2R
D V = IR2
Explanation: Ohm\'s Law: voltage equals current times resistance.
A Volt
B Watt
C Ohm
D Ampere
Explanation: Ampere (A) is the SI unit of electric current.
A Cross-sectional area
B Voltage
C Current
D Length
Explanation: R = rho L/A, directly proportional to length.
A 8 ohm
B 1 ohm
C 4 ohm
D 2 ohm
Explanation: Req = R/n = 4/2 = 2 ohm for equal resistors in parallel.
A Watt
B Ampere
C Volt
D Joule
Explanation: Energy is measured in Joules.
A Different
B Infinite
C Zero
D Same
Explanation: Same current flows through all components in series.
A 10 V
B 2.5 V
C 0.4 V
D 7 V
Explanation: V = IR = 2 x 5 = 10 V.
A Zero
B Equal to external
C Very low
D Infinite
Explanation: Ideal voltmeter has infinite resistance to draw no current.
A Conservation of energy
B Conservation of mass
C Conservation of momentum
D Conservation of charge
Explanation: Sum of currents at a junction is zero, based on charge conservation.
A P = V2/R
B P = I2R
C P = VI
D All of these
Explanation: All three are equivalent expressions for power.
A High R in series
B Low R in series
C High R in parallel
D Low R in parallel
Explanation: Low resistance shunt in parallel bypasses excess current.
A Ampere
B Watt
C Volt
D Ohm
Explanation: EMF is measured in Volts.
A Plate thickness
B Current
C Applied voltage
D Plate area and separation
Explanation: C = epsilon0 A/d depends on area and separation.
A Stationary charges
B All particles
C Neutral particles
D Moving charges
Explanation: Magnetic force F = qv x B acts only on moving charges.
A Right hand thumb rule
B Left hand rule
C Coulomb\'s law
D Lenz\'s law
Explanation: Right hand thumb rule gives the field direction.
A Parallel to field
B Perpendicular to field
C At 45 degrees
D Current is zero
Explanation: F = BIL sin theta, maximum at 90 degrees.