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Quiz 1
Mdcat-past-papers - DUHS Quiz
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Board: DUHS |
1. The ohm's law is applicable if:
Temp becomes infinite
Temp increases
Temp decreases
Temp remains same
2. Which of the following refers to the DC current that does not change its intensity?
Eddy current
Surge current
Leakage current
Steady current
3. The SI unit of electric charge:
Ohm
Farad
Coulomb
Ampere
4. Resistors of 5Ω and 10Ω are connected in parallel. If the potential difference across 5Ω resistor is 20V, then current through 10Ω will be:
0.5 A
30 A
2:00 AM
10:00 AM
5. A conducting wire of resistivity ρ is cut into two equal parts. The resistivity of each part will be:
The same
One fourth
√2 times
Halved
6. Four cells of emf 3V are connected in series to form a battery. Net emf of the combination is:
12 V
1.33 V
9 V
7 V
7. The electrical energy dissipated as heat in a resistor is:
I²R
I²Rt
FR
IRt
8. When different resistors are connected across the terminal of a battery:
Both emf and terminal potential difference become zero
Both emf and potential difference changes
The emf changes but terminal potential difference remains same
Both emf and terminal potential difference remain the same
9. A soft cylindrical conducting wire has resistance R. It is stretched so its length is doubled but its radius remains constant. What is the new resistance?
R/2
R
4R
2R
10. The internal resistance of a battery is:
In parallel to the external load
In series to the external load
Not connected to the external load
Zero
11. The electric potential across the terminals of a battery is called:
Potential difference
EMF
Internal potential group
Terminal voltage
12. Plasma membrane is:
permeable
selective permeable
impermeable
sub permeable
13. Plant cell wall is made up of:
lignin
hemicellulose
cutin
chitin
14. Endocytosis which involve ingestion of solid material is called:
solidocytosis
phagocytosis
pinocytosis
autocytosis
15. A phospholipid molecule has a head and two tails. Where are the tails found?
At the surface of membrane
In the interior of membrane
in the exterior of membrane
spanning of the membrane
16. Which of the following best describes the plasma membrane?
Adhesible
Permeable
impermeable
semipermeable
17. What is the cementing layer between two daughter cells called:
Primary wall
Secondary Wall
Middle lamella
Cell membrane
18. Protein layers are embedded in lipid bilayers, this was explained by:
Lock and key model
Induce fit model
Fluid mosaic model
Sandwich model
19. The layer of the plant cell wall formed at the time of cytokinesis is:
Primary wall
Middle Lamella
Secondary wall
Tertiary wall
20. Cell membrane is selectively permeable due to:
Proteins
Phospholipids
Cholesterol
Enzymes
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