Q). For any position of the object in front of the human eye, the image distance is
A) 25 cm
B) 5 cm
C) 2.5 cm
D) 1 cm
Q). Which among the following colours has the maximum angle of deviation?
A) Red
B) Blue
C) Green
D) Violet
Q). A doctor has advised to use 2.5 D lens. The focal length of the lens is
A) 40 cm
B) 250 cm
C) 2.5 cm
D) 50 cm
Q). Read the following two statements and pick the correct answer:
a) Red colour has the shortest wave length.
b) Formation of rainbow is an example for dispersion.
A) Only (a) is true
B) Only (b) is true
C) Both (a) and (b) are true
D) Both (a) and (b) are false
Q). Volt per ampere is called
A) watt
B) coulomb
C) farad
D) ohm
Q). Which among the following quantities has the unit ohm-metre?
A) Resistance
B) Resistivity
C) Charge
D) Potential difference
Q). Which among the following materials has greater resistivity at room temperature?
A) Iron
B) Glass
C) Gold
D) Germanium
Q). Three resistors each of 6 Ω are connected in the form of a triangle. The resistance across any two comers of the triangle is
A) 0.25 Ω
B) 6 Ω
C) 4 Ω
D) 18 Ω
Q). If V is the voltage, R is the resistance and I is the current, then the equation for electric power is
A) V2/R
B) IR2
C) V2R
D) V/I
Q). A potential difference of 40 V is maintained across across a conductor of resistance 20 Ω at constant temperature. The current passing through it is in amperes ………………………
A) 0.05
B) 80
C) 20
D) 2