What is the term used to describe the generation of voltage in a conductor by changing the magnetic field around it?
1
30 sec
Q.
What is the unit of magnetic flux?
2
30 sec
Q.
Which material is generally used as the core of an electromagnet?
3
30 sec
Q.
What is the SI unit of magnetic field strength?
4
30 sec
Q.
What is the term for the phenomenon where a material becomes magnetized when placed in a magnetic field and loses its magnetization when the field is removed?
5
30 sec
Q.
What is the term for the region around a magnet where magnetic forces can be detected?
6
30 sec
Q.
What is the name of the magnetic field that surrounds a current-carrying conductor?
7
30 sec
Q.
Which of the following materials can be easily magnetized?
8
30 sec
Q.
What is the name of the device used to measure the strength and direction of a magnetic field?
9
30 sec
Q.
What is the unit of measurement for magnetic flux?
10
30 sec
Q.
What is the name of the region around a magnet where its magnetic influence is felt?
11
30 sec
Q.
What is the scientific name for the area on a magnet where the magnetic force is strongest?
12
30 sec
Q.
What does the law of magnetism state?
13
30 sec
Q.
Which of the following statements is true based on the law of magnetism?
14
30 sec
Q.
What happens when a magnet is cut into two pieces?
15
30 sec
Q.
What is the significance of the law of magnetism in everyday life?
16
30 sec
Q.
How can the strength of a magnet be increased?
17
30 sec
Q.
Which type of magnet has a straight rectangular shape with opposite poles at the ends?
18
30 sec
Q.
Which type of magnet is shaped like a circular ring with a magnetic field concentrated on the inner circumference?
19
30 sec
Q.
What type of magnet is shaped like a curved 'U' and is often used in experiments to demonstrate magnetic field lines?
20
30 sec
Q.
Which of the following is not a kind of magnet as to shape?
21
30 sec
Q.
Which type of magnet can be easily demagnetized?
22
30 sec
Q.
Which type of magnet is created by passing an electric current through a coil of wire?
23
30 sec
Q.
Which type of magnetic materials have a spontaneous net magnetic dipole moment, even in the absence of an external magnetic field?
24
30 sec
Q.
Which type of magnetism is exhibited by materials that become magnetic only when exposed to an external magnetic field?
25
30 sec
Q.
Which type of magnetism is exhibited by materials with no unpaired electron spins and no net magnetic moment?
26
30 sec
Q.
Which type of magnetism occurs in materials that have unpaired electron spins and are attracted to magnetic fields?
27
30 sec
Q.
Which type of magnetism is characterized by materials that have spontaneous magnetic moments even in the absence of an external magnetic field?
28
30 sec
Q.
Which property of light refers to its ability to be reflected off a surface?
29
30 sec
Q.
Which property of light refers to its ability to bend when passing from one medium to another?
30
30 sec
Q.
Which property of light refers to its ability to spread out when passing through a narrow opening or around obstacles?
31
30 sec
Q.
What property of light determines its color?
32
30 sec
Q.
Which property of light refers to its ability to produce color when passing through a prism?
33
30 sec
Q.
Which property of light causes a pencil placed in a glass of water to appear bent at the water's surface?
34
30 sec
Q.
Which property of light allows us to see ourselves in a mirror?
35
30 sec
Q.
A concave mirror has a focal length of 10 cm. If an object is placed 20 cm away from the mirror, what type of image is formed?
36
30 sec
Q.
When an object is placed beyond the focal point of a concave mirror, the image formed is:
37
30 sec
Q.
A beam of light travels from air into glass, making an angle of 30 degrees with the normal line. If the index of refraction for air is approximately 1.00 and for glass it is approximately 1.50, what is the angle of refraction?
38
30 sec
Q.
39
30 sec
Q.
How does a simple electric motor transform electrical energy into mechanical energy?
40
30 sec
Q.
What effect does increasing the voltage to a simple electric motor have on its speed?
41
30 sec
Q.
A combination circuit has two resistors in series of 6 ohms each and this series combination is connected in parallel with a 3 ohm resistor. What is the equivalent resistance of the entire circuit?
42
30 sec
Q.
What is the formula to calculate power in a DC circuit?
43
30 sec
Q.
What unit is used to measure electrical power?
44
30 sec
Q.
45
30 sec
Q.
Which of the following formulas represents the relationship between power (P), voltage (V), and resistance (R) in an electrical circuit?
46
30 sec
Q.
If an object is placed 10 cm in front of a convex lens with a focal length of 5 cm, what is the magnification of the image produced?
47
30 sec
Q.
An optical instrument uses a single convex lens to magnify objects. If the lens has a focal length of 15 cm and an object is placed 10 cm from the lens, where will the image form?
48
30 sec
Q.
If a convex lens with a focal length of 10 cm forms an image 20 cm away from the lens, how far must the object be from the lens?
49
30 sec
Q.
A concave lens has a focal length of -15 cm. If an object is placed 30 cm in front of the lens, what is the magnification of the resulting image?
