Physics SS3 2nd Term
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1 / 60
Find the peak value of the current if a 2µF capacitor is connected directly across a 150Vrms, 60Hz a.c source
2 / 60
The device used to measure electric current is ______
3 / 60
Find the r.ms value of the current if a 2µF capacitor is connected directly across a 150Vrms, 60Hz a.c source.
4 / 60
The rate of flow of electric charge is called ______
5 / 60
A resistor of 10 ohms carries a current of 2A. The voltage across it is _____
6 / 60
For an a.c circuit, the instantaneous power is given by ___________
7 / 60
The energy possessed by a body due to it's motion is ______
8 / 60
Irradiation is the process of ____________
9 / 60
Calculate the peak voltage of a mains supply of r.m.s value of 220V.
10 / 60
Ohms law states that the current in a conductor is directly proportional to the ____
11 / 60
The nucleus of an atom contains _______
12 / 60
The S.I unit of temperature is ______
13 / 60
The ________ value of the current is the effective value of the the current.
14 / 60
If an a.c voltage is represented by v= 4 sin 900 πt, calculate the frequency of the circuit.
15 / 60
Heat is transferred in liquids mainly by _____
16 / 60
Work is done when a force ______
17 / 60
The change from liquid to gas is called _____
18 / 60
Which radiation has the highest frequency?
19 / 60
The upward force exerted by a fluid on a body immersed in it is called ______
20 / 60
The unit of sound energy is ______
21 / 60
The pressure exerted by a liquid depends on ______
22 / 60
____________ is a spontaneous process.
23 / 60
Calculate the resonance frequency of an a.c voltage of amplitude 2.0 volts which connected to an RlC series circuit, assuming the resistance in the circuit is 5 ohms, and the inductance and capacitance are 3mh and 0.05 uf respectively.
24 / 60
Calculate the angular velocity of an a.c voltage whuch is represented by V = 4 sin 900 πt.
25 / 60
In a.c circuit the peak value of the potential difference is 180v. What is the instantaneous p.d when it has reached 1/8th of a cycle?
26 / 60
An ammeter connected to an a.c circuit records 5.5A. What is the peak value of the current?
27 / 60
The unit of power is ______
28 / 60
The average value of an a.c voltage is _________
29 / 60
Light travels fastest in _____
30 / 60
Which of the following statement is not true of the isotope of an element? They _____________
31 / 60
The instrument used to measure atmospheric pressure is ______
32 / 60
n in an energy level of an atom represent __________
33 / 60
The distance between two crests or troughs on a wave is the ______
34 / 60
When compared, the r.m.s value is .......... the peak value.
35 / 60
Find the peak value of current in a 2µF capacitor which connected directly across a 150Vrms, 60Hz a.c source.
36 / 60
Which of the following is an example of a simple machine?
37 / 60
__________ is the state of vibration of a periodically varying sytems at a particular time, wt = phase angle.
38 / 60
Which of the following is a vector quantity?
39 / 60
A mirror that always forms virtual images is called ____
40 / 60
_____________process produces less dangerous by-products.
41 / 60
The bending of light when it passes from one medium to another is called ____
42 / 60
Resonance is said to occur in an a.c series circuit when the __________ is obtained from such a circuit
43 / 60
Calculate the frequency of an atom excited to an energy level E2 = -12 .42 x 10-19J falls to a ground level of energy Eo = - 30.3 x 10-19J.
44 / 60
The S.I. unit of electric current is _____
45 / 60
Calculate the maximum a.c. current at resonance in an a.c voltage of amplitude 2.0 volts which connected to an RlC series circuit, assuming the resistance in the circuit is 5 ohms, and the inductance and capacitance are 3mh and 0.05 uf respectively.
46 / 60
The ____________ of the current Io is the maximum numerical value fo the current.
47 / 60
The __________ of a radioactive element is the time taken for half of the atoms initially present in the element to decay.
48 / 60
If an a.c voltage is represented by 1f
V = 4 sin 900 πt, calculate the peak voltage.900
49 / 60
The mechanical advantage of a machine is the ratio of _____
50 / 60
A force of 20N moves and object 5m. The work done is
51 / 60
Electrical resistance is measured in _____
52 / 60
The radiation that was neither affected by the electric or magnetic field is called ___________
53 / 60
_______________is also called energy quanta.
54 / 60
The splitting of white light into it's component colours is called _____
55 / 60
The S.I unit of force is _____
56 / 60
Radio waves travel with the speed of _____
57 / 60
The rate of change of velocity with time is called ____
58 / 60
A device used to convert electrical energy into mechanical energy is ____
59 / 60
The average power in an a.c circuit is given by ________
60 / 60
__________ is defined as the instantaneous rate of decay per unit atom of a substance.
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