Physics-
General
Easy
Question
Television signals on earth cannot be received at distances greater than 100 km from the transmission station. The reason behind this is that
- The receiver antenna is unable to detect the signal at a distance greater than 100 km
- The TV programme consists of both audio and video signals
- The TV signals are less powerful than radio signals.
- The surface of earth is curved like a sphere
The correct answer is: The surface of earth is curved like a sphere
Related Questions to study
Physics-
A uniform but time varying magnetic field B (t) exists in a circular region of radius a is directed into the plane of the paper as shown. The magnitude of the induced electric field at point P at a distance r from the centre of the circular region.
A uniform but time varying magnetic field B (t) exists in a circular region of radius a is directed into the plane of the paper as shown. The magnitude of the induced electric field at point P at a distance r from the centre of the circular region.
Physics-General
Physics-
Finger prints on a piece of paper may be detected by sprinkling fluorescent powder on the paper and then looking it into
Finger prints on a piece of paper may be detected by sprinkling fluorescent powder on the paper and then looking it into
Physics-General
Physics-
The waves which can travel directly along surface of the earth are known as
The waves which can travel directly along surface of the earth are known as
Physics-General
Physics-
Which has the longest wavelength
Which has the longest wavelength
Physics-General
Physics-
The fundamental source of e. m. waves
The fundamental source of e. m. waves
Physics-General
Physics-
For the given circuit shown in fig, to act as full wave rectifier, a.c. input should be connected across ........and........the d.c. output would appear across........and........
For the given circuit shown in fig, to act as full wave rectifier, a.c. input should be connected across ........and........the d.c. output would appear across........and........
Physics-General
Physics-
Two identical P-N junction may be connected in series with a battery in three ways (fig below). The potential drops across the two P-N junction are equal in-
Two identical P-N junction may be connected in series with a battery in three ways (fig below). The potential drops across the two P-N junction are equal in-
Physics-General
Physics-
If a, b, c, d are inputs to a gate and x is its output, then, as per the following time graph, the gate is :
If a, b, c, d are inputs to a gate and x is its output, then, as per the following time graph, the gate is :
Physics-General
Physics-
Identify the semiconductor devices whose characteristics are given below, in the order (A), (B), (C), (D) :
Identify the semiconductor devices whose characteristics are given below, in the order (A), (B), (C), (D) :
Physics-General
Physics-
Truth table for system of four NAND gates as shown in figure is :
Truth table for system of four NAND gates as shown in figure is :
Physics-General
Physics-
A p-n junction (D) shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit. 
The current (I) in the resistor (R) can be shown by:
A p-n junction (D) shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit. The current (I) in the resistor (R) can be shown by:
Physics-General
Physics-
The logic circuit shown below has the input waveforms ‘A’ and ‘B’ as shown. Pick out the correct out put waveform.
The logic circuit shown below has the input waveforms ‘A’ and ‘B’ as shown. Pick out the correct out put waveform.
Physics-General
Physics-
In the circuit below, A and B represent two inputs and C represents the output. 
The circuit represents
In the circuit below, A and B represent two inputs and C represents the output. The circuit represents
Physics-General
Physics-
Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate?
Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate?
Physics-General
Physics-
If in p-n junction diode, a square input signal of 10 V is applied as shown. Then the output signal across R L will be
If in p-n junction diode, a square input signal of 10 V is applied as shown. Then the output signal across R L will be
Physics-General
