Resistance of metal is affected by
A) presence of impurities
B) temperature
C) both A and B
D) pressure
Correct Answer:
Verified
Q11: Component which obeys ohm's law is called
A)resistive
Q12: At constant temperature, resistance and cross-sectional area
Q13: Current and voltage are
A)directly related
B)inversely related
C)not related
D)gives
Q14: At threshold voltage, resistance of diode
A)decreases
B)increases
C)remains constant
D)varies
Q15: Resistance of a particular wire depends upon
A)size
Q17: If current and potential difference are directly
Q18: Effect of diffraction is greatest if waves
Q19: Visible light has wavelength of
A)5 × 10-7
Q20: From double-slit experiment, the quantities to be
Q21: For destructive interference, the path difference is
A)odd
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