Engineering physics and basic electrical engineering: units and measurements, work power energy, current voltage resistance, basic circuits - One Line Questions
1.
A 100 Ohm resistor has 10 Volts applied across it. What is the current flowing through it? —
0.1 A
2.
If a 60W light bulb is used for 10 hours, how much energy does it consume in kilowatt-hours (kWh)? —
0.6 kWh
3.
A 12V battery is connected to a 4 Ohm resistor. What is the current flowing? —
3 A
4.
What is the total resistance of two 10 Ohm resistors connected in series? —
20 Ohms
5.
What is the total resistance of two 10 Ohm resistors connected in parallel? —
5 Ohms
6.
What is the SI unit of electric potential difference (voltage)? —
Volt
7.
What is the SI unit of electric charge? —
Coulomb
8.
What is the unit of electric charge? —
Coulomb
9.
A circuit with a break in it, preventing current flow, is called an: —
Open circuit
10.
The ability of a material to oppose the flow of electric current is called: —
Resistance
11.
Which quantity is defined as the work done per unit charge? —
Voltage
12.
In a series circuit, the current flowing through each component is: —
The same
13.
Which quantity is the rate of doing work? —
Power
14.
Kirchhoff's Current Law (KCL) is based on the principle of conservation of: —
Charge
15.
If the voltage across a resistor is doubled, while the resistance remains constant, the current will: —
Double
16.
If the length of a wire conductor is doubled, its resistance will: —
Double
17.
In a parallel circuit, if one branch is opened, the current in other branches will: —
Remain unchanged
18.
If the resistance of a conductor is increased, its ability to conduct current: —
Decreases
19.
When a conductor is short-circuited, the resistance becomes approximately: —
Zero
20.
What is the SI unit of force? —
Newton
21.
The SI unit of power is: —
Watt
22.
What is the unit of electrical energy consumption in household meters? —
Kilowatt-hour
23.
What is the unit of electrical potential energy? —
Joule
24.
Which of the following is a unit of power? —
Joule per second
25.
The formula for kinetic energy (KE) is: —
KE = 1/2 mv^2
26.
What is the unit of electrical power rating for appliances? —
Watts
27.
The energy stored in a charged capacitor is a form of ______ energy. —
Potential
28.
Potential energy is the energy of: —
Position or configuration
29.
Which of the following is a fundamental unit in the SI system? —
Ampere
30.
The SI unit of energy is: —
Joule
31.
What is the unit of electrical conductance? —
Siemens
32.
What is the unit of measurement for electrical resistance in the Imperial system? —
There is no distinct Imperial unit; Ohm is universally used.
33.
Which law describes the conservation of energy in an electrical circuit? —
Kirchhoff's Voltage Law
34.
What is the formula for calculating power (P) when voltage (V) and current (I) are known? —
P = V * I
35.
A circuit where components are connected end-to-end is called a: —
Series circuit
36.
Kinetic energy is the energy of: —
Motion
37.
The energy stored in an inductor due to current flow is a form of ______ energy. —
Magnetic
38.
Which physical quantity is measured in Joules? —
Energy
39.
What does Ohm's Law state? —
Voltage is directly proportional to resistance and current
40.
The rate of flow of electric charge is called: —
Current
41.
The product of voltage and current represents: —
Power
42.
A voltmeter is always connected in ______ with the component across which the voltage is to be measured. —
Parallel
43.
An ammeter is always connected in ______ with the component through which the current is to be measured. —
Series
44.
Resistance is measured in: —
Ohms
45.
In a parallel circuit, the voltage across each component is: —
The same
46.
Work done is defined as force multiplied by: —
Displacement in the direction of the force
47.
Which of the following is the SI unit of electric current? —
Ampere
48.
What is the SI unit of electrical resistance? —
Ohm
49.
What is the SI unit of electric current? —
Ampere
50.
According to Joule's Law of Heating, the heat produced in a conductor is proportional to: —
The square of the current, resistance, and time