oppositely charged plate with respect to vertical distance, y, what is the equivalent
expression of the kinetic energy of the falling charge?
a.mv?/2 b.2Ey c. qEy d.Eq
1.9 When an electron, e, is projected horizontally into a uniform electric field, E, with an
(2)
initial velocity, Vo, with an attraction towards positive charge at time, t, what is the
value of the horizontal displacement?
a. eEt? b.at? c.Vot d.eEt.
1.10 Capacitors have many applications in electrical circuit including the following except. (2)
a. turning in radio circuit b. eliminating of spark in switches
c. rectification of coil in atransformer d. blocking noise in a.c. amplifies
1.11 The parallel plates of an air-filled capacitor are everywhere 1.0 mm apart. What must (2)
the plate area be if the capacitor is to be 1.0 F?
a. 1.1 x 108 m?
b. 1.2 x 108 m?
c. 1.3 x 108 m?
d. 1.4 x 108 m?
1.12 The instrument used in the measurement of magnetic force is;
(2)
a. magnetic flux b. magnetometer c. magnetic filling | d. iron filling
1.13 The ability of one coil to induce current in the nearby coil by the phenomenon of
(2)
Induction when the current in the first coil changes is called
a. self-induction
—_b. electromagnetic induction c. mutual induction
d. inductance
1.14 An electrical device that convert converts mechanical energy into electric energy
(2)
or vice versa is called
a. converterb.dynamo c.motor d. generator.
1.15 The root mean square value of the voltage in an ac circuit is:
(2)
a. 0.637 Vmax b.0.707 Vmax C.2Vmax d. V2 Vinax